GDBS evaluates standard cosmological integrals directly in the browser, deterministically, from the cosmological parameters you supply. It is a bridge to high-performance computing for early exploration, not a surrogate for a full Boltzmann code or a many-node cluster run.
Given a set of density parameters and an expansion rate, the platform integrates the Friedmann equation and related quantities and returns derived observables. The measured cosmological parameters themselves are observational inputs; GDBS does the integral, and reports the result against the published values.
Verified The sound horizon r_s is computed by an independent numerical Friedmann plus sound-speed integral (ds/dz = c_s/H integrated from z = 1100), reproducing the Planck 2018 value within a few percent (Planck 2018, A&A 641, A6).
Verified The age of the universe, computed via the Friedmann integral, agrees with the expected value within tolerance.
These are first-principles integrals from input cosmological parameters. The measured parameters themselves (density fractions, Hubble constant) are observational inputs, stated honestly. GDBS reproduces the derived quantities; it does not fit or measure the underlying cosmology. Use it as a fast in-browser testbed and a bridge to HPC, not as a replacement for a full cluster-scale pipeline.
Run these integrals yourself in the browser and check the numbers against the published references.